Scapholunate ligamentous instabilities (dissociations, subdislocations, dislocations).

Scapholunate dissociation represents a portion of a perilunar dislocation or a residual thereof. It leads to a weak and painful wrist. Recognition is often delayed and adequate treatment challenging. Reconstruction using tendinous augmentation of the ligamentous structures is helpful but uncertain. Repair of the interosseous membrane to the scaphoid with capsular plication, reduction and temporary fixation, and ligamentous augmentation may restore alignment and function. Salvage procedures are necessary in instances of failed reconstruction, late or severe scapholunate dissociation.